Re: [LAD] some updated RT programming wisdom
On Wed, Nov 18, 2020 at 06:16:49PM +0100, Jörn Nettingsmeier wrote: > And I have a question: since nobody seems to pre-fault their stacks and > heaps: is that the reason for xruns when adding new clients to the JACK > graph? We all know not to malloc() in the process thread, but of course we > may be using malloc'ed memory for the first time... That could well be so. But AFAIK, at least Jack1 may skip some cycles while initialising a client or a creating ports, even if the client behaves perfectly. Not sure about Jack2. Ciao, -- FA ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] some updated RT programming wisdom
On 11/18/20 6:04 PM, Jörn Nettingsmeier wrote: It may be old news for seasoned programmers, but I found this to be a trove of information that goes a bit beyond of the traditional wisdom of "what's safe in a jack process() thread", so I thought I'd share it here (courtesy of LWN's free subscriber link feature, please check out LWN!) https://lwn.net/SubscriberLink/837019/e323ab1009054668/ https://ogness.net/ese2020/ese2020_johnogness_rtchecklist.pdf And I have a question: since nobody seems to pre-fault their stacks and heaps: is that the reason for xruns when adding new clients to the JACK graph? We all know not to malloc() in the process thread, but of course we may be using malloc'ed memory for the first time... -- Jörn Nettingsmeier Tuinbouwstraat 180, 1097 ZB Amsterdam, Nederland Tel. +49 177 7937487 Meister für Veranstaltungstechnik (Bühne/Studio), Tonmeister VDT http://stackingdwarves.net ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
[LAD] some updated RT programming wisdom
It may be old news for seasoned programmers, but I found this to be a trove of information that goes a bit beyond of the traditional wisdom of "what's safe in a jack process() thread", so I thought I'd share it here (courtesy of LWN's free subscriber link feature, please check out LWN!) https://lwn.net/SubscriberLink/837019/e323ab1009054668/ https://ogness.net/ese2020/ese2020_johnogness_rtchecklist.pdf All best, Jörn -- Jörn Nettingsmeier Tuinbouwstraat 180, 1097 ZB Amsterdam, Nederland Tel. +49 177 7937487 Meister für Veranstaltungstechnik (Bühne/Studio), Tonmeister VDT http://stackingdwarves.net ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
